Jared Leto offered weight loss advice to Sienna Miller recently because she had to quickly lose weight for a film role. Presumably, Leto considers himself qualified to offer advice because he’s just put on and then lost 60 pounds for his role as Mark David Chapman in the film Chapter 27. Also, it’s fairly likely he considers himself God – or at least, A god, if not THE god so that should help him in assessing whether he knows what he’s talking about enough to help someone else with advice.
So, what’s his advice? Well, it’s to only drink water with pepper in it for a month and to have sex a lot. What a great way for Leto to bring focus back to his unendingly self absorbed self. Give a little advice and the mention how much sex you get. Excellent.
Of course, endlessly running on an unchecked ego and having your head so far up your own ass that you can’t physically get food into your mouth also assists in caloric restriction so…you know, there are those factors to consider too. Successful weight loss requires a overall approach not just one thing. [source]